lowered performance with new cat back?

Recently had a manifold fitted as was a dodgy weld on previous that was cracked. Only had the car 11 weeks. I've noticed power seems to have been lost, the pull isn't quite there. Any thoughts?
Yes I'm a girl haha
 
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could be a few things...usually,when a new cat back is fitted you might experience a flat spot around 2,000-3,000 rpm...mine does it too exactly from 2,5k-2,8k...a remap should help
 
It's just the standard system, why should it alter though when it was a replacement? It did run better on a cracked exhaust haha. Not impressed though. Did wonder about a remap. Not a cheap job though eh.
 
Thank you and Ive read about the flat spot and you're right it is around there. Just lost its pull. Seems more sluggish. Only had it done on Fri so shouldn't they put it right?
 
Well you shouldnt need to remap it if it was swapped standard with standard.

It still has the centre silencer in place?
 
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My thoughts too. I'm ringing them tomorrow, it should run better not worse surely. Have you had a remap and if so is it a safe thing to do? Wouldn't mind extra bhp;-)
 
I took it to a Renault specialist so I expected it to be right. As far as I know everything is how it should be. Worth getting checked out elsewhere?
 
as Chris said..if swapped for a standard back box you shouldnt get this issue really..but who knows what happens to the ecu after a swap..maybe still adjusting ??
hope you get it sorted soon
 
To be honest I was well impressed with its performance prior to the cat back. I'm taking it back. It's cos I'm a girl!;-)
 
Cheers I went to Accrington so I'll give them a bell first. Spent enough so id like them to look at it again. I'm like a dog with a bone; -)
 
I saw this earlier. I would but saving for a hol haha. Reckon I'd need quite a bit of juice to do that. Love a good road to run though. I went to Kirkby devils bridge today but the restrictions and the police spoiled it a bit. I'll think about it.
 
np..me and jimmyd81 are meeting at the krispy kreme near the TC on this Saturday and driving down together..booked a hotel,where we meet with Chris91...
 
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